18.49=r^2

Solution for 18.49=r^2 equation:

Simplifying
18.49 = r2

Solving
18.49 = r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-1r2' to each side of the equation.
18.49 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
18.49 + -1r2 = 0

Add '-18.49' to each side of the equation.
18.49 + -18.49 + -1r2 = 0 + -18.49

Combine like terms: 18.49 + -18.49 = 0.00
0.00 + -1r2 = 0 + -18.49
-1r2 = 0 + -18.49

Combine like terms: 0 + -18.49 = -18.49
-1r2 = -18.49

Divide each side by '-1'.
r2 = 18.49

Simplifying
r2 = 18.49

Take the square root of each side:
r = {-4.3, 4.3}